For double headed compressor. See Notes below for parts included in this kit. Filter Element (RPI Part #CME102). Filter Element (RPI Part #CME103). (2) Air Filter Element Kit (RPI Part #CMK065). Models for RPI Part #CMK142. AirStar AIR TECHNIQUES 2-1, 2-2, 3, 21,22, 30. If you have special requirements such as overnight, 2-day, or 3-day. You can be sure that your order will be handled professionally and accurately by our Customer Service Department.